Brake



May' 5,11931. 1 E. LA 1,803,396

Filed-Dc. 3, 1927 lN'vENToR i I y LunagYR E. LABmE ATTORNEY Patented May5, 1931 UNITED STATES PATENT OFFICE LUDGER E. LA BRIE, OF SOUTH BEND,INDIANA, ASSIGNOR TO BENDIX BRAKE COM- PAN Y, OF SOUTH BEND, INDIANA, ACORPORATION 0F ILLINOIS BRAKE Application led December 8, 1927. SerialNo. 237,375.

This invention relates to brakes and is illustrated as embodied in aninternal exanding brake for an automobile. An object of the invention isto provide a very effective brake which can be manufacturedinexpensively.

Various features of novelty relate to the anchoring of the brake on apair of devices arranged in a novel manner on opposite sides of the camor its equivalent, and which also serve to hold a supporting bracket forthe cam shaft, to various features of vconstruction of the brake shoes,to a novel positioning device for the shoes, and to other desirabledetails of construction which will be appartant from the followingdescription of one illustrative embodiment shown in the accompanyingdrawing, in which:

Figure 1 is a vertical section through the brake, just inside the headof the brake drum, and showing the brake shoes in side elevation;

Figure 2 is a artial horizontal section on the line -2 2 of) Figure 1and showing the anchorage of the brake; and

Figure 3 is a partial vertical section through the brake operating meanson the line 3 3 of Figures 1 or 2.

In the illustrated arrangement the brake includes a rotatable drum 10,at the open side of which is arranged a stationary sup' port such as abacking plate 12, and Within which is arranged the friction means of thebrake, which in this instanceincludes two novel brake shoes 14 connectedby an adj ustable floating joint 16. The shoes 14 are forced apart toapply the brake, against the resistance of a return spring 18, by meanssuch as a fioating cam 20 extended downwardly to form an operating armsecured by a pivot 22 to an arm 24 on a cam shaft 26 operated by a lever28. The shaft 26 is journaled in a bearing formed by drawing tubularextensions on 'two stampings 30 and 32 which are welded or otherwisesecured to two plates 34 arranged on opposite sides of the backing plate12.

According to one feature of the invention, the lates 34 forming thebracket for the cam shaft 26 are secured to the backing plate 12 bydevices such as posts 36 havin collars 38 engaging the inner plate 34 anhaving threaded on their outer ends clmpinv nuts 40 seated against theouter plate 34, the devices 36 being extended through slotsV formed inthe shoes 14 so that one of them servesY held by Cotter pins 46 toconfine the shoe against lateral movement and guide them in theirbrake-applying movements.

One of the features of the invention relates to forming the brake shoeswith the slots for the anchor posts 36. Preferably, each of the shoes isformed with a central. stiffening web which is slotted at its end at 50to permit the assage of the anchoring posts 36. Reinforcing plates 52 onopposite sides of this web are also slotted for the passage of theanchoring posts and are spot welded to opposite sides of the web of theshoes, the reinforcing plates 52 having portions extending beyond theweb and which are preferably unslotted. Thrust members 54 engaging thecam 20 have parts extending into the space between the reinforcingplates 52 into engagement with the ends of the webs of the shoes, andpreferably have laterally ex Ytendingportions projecting across andeniging the ends .of the reinforcing plates 52.

embers 54 may be welded or otherwise secured to the shoes.

positioned on the backing plate and a strap I 66 pivotally connected byone end to the stud and having a bolt 68 in the other end` thereofengaging a slot 70 in the web of the shoe. These devices may be anydesired form, as may also the adjustable joint 16. and they aretherefore not described herein in detail.

lVhile one illustrative embodiment of the invention has .been describedin detail, it is not my intention to l-imit its scope to that particularembodiment or otherwise than by the terms of the appended claims.

I claim:

1. A brake comprising, in combination, a drum, a backing plate at theopen side of the drum, a friction device in the drum having adjacentseparable ends and formed with slots in said ends, a shaft passingthrough the backing plate and having an applying device actin on saidends, supporting means adjacent t e backing plate and in which the shaftis journaled, and devices on opposite sides of the shaft and securingsaid means to the backing plate and which extend through the slots inthe ends of the friction device and one of which serves as an anchor'for the friction device when the drum is turning in one direction andthe other of `which serves as an anchor for the friction device when thedrum is turning in the other direction.

2. A brake comprising, in combination, a drum, a backing plate at theopen side of the drum, a fioating friction device in the drum havingadjacent separable ends and formed with slots in said ends, a shaftpassing through the backing plate and having an applying device actingon said ends, supporting means adjacent the backing plate and in whichthe shaft is journaled, and devices on opposite sides of the shaft andsecuring said means to the backing plate and which extend through theslots in the ends of the friction device and against one of whichdevices the friction device anchors when the drum is turning in onedirection and against the other of which devices the friction deviceanchors vwhen the drum is turning in the other direction.

3. A brake comprising, in combination, a shoe formed with a slot, a postshouldered to form a portion of reduced diameter passing through saidslot, a washer resting against the shoulder of said post and enga ingone side of the shoe, and another was er carried by the reduced-diameterportion of the post and held against movement lengthwise of the post andengaging the opposite side of the shoe.

4. A brake shoe having a stiifening web formed with a slot extendinginwardly from its end, slotted reinforcing plates secured on oppositesides of said Web and having unslotted portions extending beyond the endof said web, and a thrust member extending between said portions of thereinforcing plates engaging the end of the web and abutting thereinforcing plates.

5. A brake shoe having a stiffening web, reinforcing plates secured onopposite sides of said web and extending beyond the end of said web, anda thrust member extending between said portions of the reinforcingplates and abutting the end of the web.

6. A brake shoe having a stifening web formed with a. slot extendinginwardly from its end, slotted reinforcing plates secured on oppositesides of said web and having unslotted portions extending be ond the endof said web, and a thrust mem er extending between said portions of thereinforcing plates in line with said web, said thrust member engagingthe web and abutting the extending portions of the reinforcing plates.

7. A brake shoe havin a stiffening web, reinforcing plates secure onopposite sides of said web and having portions extending beyond theendof said web, and a thrust member extendin between said portions ofthe reinforcing p ates in line with said web and projecting laterallyacross the ends of the reinforcing plates.

8. A brake comprising, in combination, va drum, a backing plate at theopen side of the drum, a floating friction device in the drum havingadjacent separable ends, a shaft passing through the backing plate andhaving an applying device acting on said ends, supporting means adjacentthe backing platen and in which saidshaft is journaled, and a pair ofanchorage devices securing the supporting means to the backing plate onopposite sides of the shaft and on one of which one of said ends anchorswhen the drum is turning in one direction and on the other of which theother of said ends anchors when the drum is turning in the otherdirection.

9. A brake, comprising, in combination, a drum, a backing plate at theopen side of the drum, afloating friction device in the drum havingadjacent separable ends, a shaft passing through the backing plate andhaving an applying device acting on said ends, sup

porting means adjacent the backing plate and in which said shaft isjournaled and which holds the shaft against shifting, and anchoragemeans securing the supporting means to the backing plate and on whichone of said ends anchors when the drum is turning in one direction andon which the other of said ends anchors when 4the drum is turning in theother direction.

10. A brake backing plate having reinforcing parts provided with abearing for an operating shaft, in combination with a pair of anchormembers extending through the backing late on opposite sides of thebearing and aving collars on the inner side of lthe plate and nutsthreaded on their ends and co-operating with the collars to clamp saidparts to the backing plate.

11. A brake comprising, in combina-tion, a drum a support, a pluralityof fioating connected shoes withm the drum, applying means for saidshoes including a shaft extending crosswise of said support, a bearindevice in which said shaft is journaled, an

Y a pair of anchors securing the bearing device to said support andagainst one of which one of said shoes anchors when the drum is turningin one direction and against the other of which a different one of saidshoes anchors when the drum is turning in the other direction.

12. A brake cornprisinv in combination, a drum,V a support, a plura ityof fioating connected shoes within the drum, applying means for saidshoes including a shaft extending crosswise of said support, a bearingdevice in which said shaft is journaled, and anchorage means securingthe bearing device to said support and against which one of said shoesanchors when the drum is turning in one direction and against which adifferent one of said shoes anchors when the drum is turnin in the otherdirection.

A 13. A bra-ke acking plate having a shaft bearingsecured thereto by apair of spaced brake anchors.

14. A brake backing plate having a shaft bearing ixedly secured theretoby a brake anchorage means.

15. A brake backing plate having reinforcing plates arranged flatagainst its inner and outer faces and provided with a. shaft bearing, incombination with brake anchors so on opposite sides of said facingsecuring the reinforcing plates to the hacking plate.

brake backing plate having reinforcing plates arranged Hat against itsinner outer faces and provided with a shaft bearing, in combination withbrake anchormeans securing the reinforcing plates to the backing plate.y

1'?. A brake backing plate having mounted thereon a shaft bearingincluding a part @a resting fiat against the plate, in combination withbrake anchors on opposite sides of said bearing and securing said partto the backing plate.

18. A brake backing plate having mounted thereon ashaft bearingincluding a part resting fiat against the plate, in combination withbrake anchorage means iXedly securing said part to the backing plate.

19. A brake backing plate having a shaft fe hearing withlaterally-extending portions festin against the plate7 in combinationwith ake anchors passing through said plate and said portions and havingcollars and nuts threaded. on their ends and cooperating with thecollars to bolt the plate and the shaft bearing together.

ln testimony whereof, -,iave hereunto gned name.

LUDGER LA BRIE.

